US PATENT SUBCLASS 4 / 352
.~.~.~ Annular ventilator

Current as of: June, 1999
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4 /   HD   BATHS, CLOSETS, SINKS, AND SPITTOONS

300  DF  FLUSH CLOSET {22}
347  DF  .~ Ventilated, i.e., noxious fume removal {1}
348  DF  .~.~ Bowl {3}
352.~.~.~ Annular ventilator

DEFINITION

Classification: 4/352

Annular ventilator:

(under subclass 348) Subject matter wherein the gas removing means has an intake which includes a channel subtending a portion of the cross section of the bowl in a horizontal plane and is usually located below the rim.